A block of mass 1.36$1\mathrm{.}36$ kg sliding with a constant velocity of 4.93$4\mathrm{.}93$ m/$/$s to the north, which collides 100%$100\%$ elastically with a second, stationary block, of mass 3.16$3\mathrm{.}16$ kg,$,$ head−$-$on,$,$ and rebounds back to the south, eventually colliding 100%$100\%$ elastically with a wall and rebounding northward. It then overtakes the second block, which is still moving north as a result of the first collision. What will be the speeds of the 1.36−$1\mathrm{.}36-$kg and 3.16−$3\mathrm{.}16-$kg blocks, respectively, after their SECOND collision with one another?